[swift-users] File IO in Swift for Linux

John Myers myersj at shawanoschools.com
Fri May 20 20:44:59 CDT 2016

I've just finished reading a very spirited debate on the merits
of streaming versus reading in an entire file.  I'm convinced that both are
ideal depending on the situation.  Thank you for the responses I received
on my original post.  I had tried previously on StackOverflow, having
joined just for that purpose, but found myself censured and 'put on hold'
for asking a poor question, so I certainly enjoy and appreciate your guy's
help and support.  Yesterday I discovered what I consider to be an elegant
solution (because of it's simplicity and that I comprehend the code) on the
sample code of the IBM BlueMix playground website.  I include it here in
only slightly modified form.  They didn't have a 'create file' version, but
I can work on trying to come up with that when I get a chance.  (Or, any of
you can suggest that reverse version).  Here it is... (I did test it, and
it works)

/* Opens a file and prints it to the
   console. Shows how file input can be done in swift.
   From IBM BlueMix Swift Playground sample code selections.

#if os(OSX) || os(iOS) || os(watchOS) || os(tvOS)
    import Darwin
    import Glibc

let stream = fopen("Resources/sampleIn.txt", "r")

var s = ""
while (true) {
    let c = fgetc(stream)
    if c == -1 {
    s = String(Character(UnicodeScalar(UInt32(c))))
    print(s, terminator:"")



John Myers
Mathematics and Computer Science Teacher
Math Department Chair
Shawano Community High School
220 County Road B
Shawano, WI 54166
myersj at shawanoschools.com
(715) 526-2175 ext 2114
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